Yes, I am very interested in diesel conversions as well. I do like the idea of cheap fuel, high torque, and low fuel consumption but can you get away without using ether in the fuel or buying expensive DDD fuel? I have an OS 46FX I would like to convert.
One thing I'd like to try is running diesel fuel in my spark converted Saito 120. That's a normal-compression use of diesel, probably not as efficient or powerful as diesel but probably easier to set up and run, but probably not as powerful as the E85 conversion that runs on mainly alcohol. Someone mentioned this was done for an RPV program successfully, but I bet they made it run on JP-8 (or kerosene) because that is what the military requires, perhaps not the optimal fuel for hobbyists, although it's cheap and readily available everywhere. What is homebrew model diesel fuel comprised of, just kerosene and oil?
Maybe a Perry carb is what I need for my Saito 120, they have a midrange control. Do most diesel conversions require a Perry carb?